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In page Kolkata:

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Kolkata is the only Indian city with a tram network, which was operated by the Calcutta Tramways Company. It has now amalgamated to West Bengal Transport Corporation.[1] There are three operational routes: Tollygunge to Ballygunge, Gariahat to Esplanade, Shyambazar to Esplanade. Trams are environment friendly but due to slow-moving and traffic congestion, tram attracts less passengers.[citation needed] Water-logging, caused by heavy rains during the summer monsoon, sometimes interrupt transportation networks.[2][3]